If the issue is with MYOB Earnings via API import,   please contact MYOB support to fix on their end.

See below message from MYOB support-

"Thanks for reaching out.. it seems) some incorrect data inside their company file which will only return incorrect values via the API. To have this corrected, a backup of the company file will need to be sent to our Datafile Repair Team so they can investigate the issue. They will then work out a fix and apply it to the backup and send it back to be checked. Once the client is happy with the fix, the Datafile repair team and the client arrange a time between themselves to have the fix applied to the live file."